Somebody who feels comfortable whilst in the home enviroment, and rarely leaves the bounderies of their property. They may feel preasured to communicate, or may simply feel repulsed by the freedom in which other people mix and intergrate. Others see them as "boring" or "drabsters," with Glibster a modern definition of a Humdrum.
Check Mike over therechilling with the same 3 people he has done since Pre- School, is that guy Humdrum or what?
The act of using your lower lip as a shovel to clean smashed pie off the floor.
This is done without hands- to be properly humgruffin, you must rest your chin on the floor with your lip extended and propel yourself forward with your legs.